Data Comparison of Confirmed Exoplanets with Kepler Candidates

Here we show a simple statistical comparison of data for confirmed exoplanets (exoplanet.eu) and Kepler candidates (Borucki et al., 2011). This analysis was done as a quality test of the data from both sources for the Habitable Exoplanets Catalog (HEC). In this process we identified missing data and corrected a few errors in both datasets. Figure 1 shows histograms for each compared planetary parameter and Table 1 shows more details, including stellar properties. Kepler candidates were corrected as described by Muirhead et al. (2011). A discussions about this comparison will be addressed in the HEC paper.

Table 1. Comparison of the minimum, mean, and maximum value for planetary mass, radius, period, semi-major axis, mean distance, eccentricity, inclination, and equilibrium temperature for 695 confirmed exoplanets and 1235 Kepler candidates. The count column shows how much data for each parameter is available. Note: The stellar results are slightly weighted by the multiple planetary systems, there are only 571 stars in the confirmed exoplanets sample and 997 in the Kepler candidates.